Deadbolt position sensing

ABSTRACT

Determining a position of a deadbolt used to lock and unlock a door is disclosed. An electromechanical lock can include a deadbolt that can retract or extend along a linear path as the door is to be locked and unlocked. A sensor such as an accelerometer can rotate along a non-linear path as the deadbolt moves along a linear path. The accelerometer can determine a gravity vector that can be indicative of a position of the accelerometer along the non-linear path. A controller can then determine a position of the deadbolt based on the gravity vector.

CLAIM FOR PRIORITY

This application is a continuation application of U.S. patentapplication Ser. No. 15/917,220, entitled “DEADBOLT POSITION SENSING,”and filed Mar. 9, 2018, and issued as U.S. Pat. No. 10,329,801, andissued on Jun. 25, 2019, which is a continuation application ofInternational Patent Application No. PCT/US2017/052353, entitled“DEADBOLT POSITION SENSING,” and filed Sep. 19, 2017, which claimspriority claims priority to U.S. Provisional Patent Application No.62/396,794, entitled “METHOD, SYSTEM AND APPARATUS FOR A FULLYFUNCTIONAL MODERN DAY SMART LOCK,” and filed on Sep. 19, 2016, both ofwhich are incorporated by reference herein in their entirety.

TECHNICAL FIELD

This disclosure relates to an electromechanical lock, and in particulardetermining a position of a deadbolt of an electromechanical lock.

BACKGROUND

Door locks can include a deadbolt as a locking mechanism. For example,the door lock can include a lock cylinder with a key slot on one side ofthe cylinder. The other side of the cylinder can include a paddle, or atwist knob. The rotation of the cylinder using the key (inserted intothe key slot and rotated) or the paddle (moved or rotated to anotherposition) can result in the deadbolt of the lock to retract (e.g., tounlock the door) or extend (e.g., to lock the door). However, somehomeowners find it cumbersome to be limited to locking or unlocking thedoor lock of a door using the key or the paddle. Additionally, thehomeowner might not know whether the door is fully locked, or the stateof the door lock when away from the home.

SUMMARY

Some of the subject matter described herein includes anelectromechanical smart lock configured for wireless communication witha smartphone to lock and unlock a door of a home owned by a homeowner.The electromechanical smart lock installed within the door can include adeadbolt, a motor, an accelerometer, and a controller circuit. Thedeadbolt can be configured to travel along a linear path between theelectromechanical smart lock and a deadbolt slot of a door jamb as theelectromechanical smart lock transitions among an unlock state to unlockthe door and a lock state to lock the door. The motor can be configuredto retract the deadbolt into the electromechanical lock to operate inthe unlock state, and configured to extend the deadbolt into thedeadbolt slot in the lock state. The accelerometer can be coupled with acomponent of the electromechanical lock that is configured to rotatealong a non-linear path as the electromechanical smart lock transitionsbetween the unlock state and the lock state, the accelerometer alsoconfigured to determine a gravity vector representing an inclination ofthe accelerometer along the non-linear path. The controller circuit canbe configured to receive an instruction via wireless communication fromthe smartphone indicating that the electromechanical smart lock shouldlock the door of the home by transitioning from the unlock state to thelock state; cause the motor to extend the deadbolt along the linear pathtowards the deadbolt slot to lock the door; receive the gravity vectordetermined by the accelerometer as it rotates along the non-linear path;determine a position of the deadbolt along the linear path based on thegravity vector; determine that the position of the deadbolt along thelinear path corresponds to an endpoint of the non-linear path of theaccelerometer; and cause the motor to stop extending the deadbolt basedon the determination that the position of the deadbolt along the linearpath corresponds to the endpoint of the non-linear path of theaccelerometer.

Some of the subject matter described herein also includes a methodincluding receiving, by a processor, a gravity vector from a sensor, thegravity vector indicative of a position of the sensor; determining, bythe processor, a position of a deadbolt of a lock based on the gravityvector indicative of the position of the sensor; determining, by theprocessor, that the position of the deadbolt corresponds to an endpointof its travel range; and instructing, by the processor, a motor to stopadjusting the position of the deadbolt based on the determination thatthe position of the deadbolt corresponds to the endpoint of its travelrange.

In some implementations, the position of the deadbolt is along a linearpath, and the position of the sensor is along a non-linear path.

In some implementations, the sensor is an accelerometer.

In some implementations, the sensor is disposed on a component of thelock that rotates as the lock transitions among an unlock state and alock state.

In some implementations, the method includes receiving, by theprocessor, data from an electronic device indicating that the lockshould switch among an unlock state and a lock state; and adjusting theposition of the deadbolt based on receiving the data from the electronicdevice indicating that the lock should switch among an unlock state anda lock state.

In some implementations, the endpoint of the travel range of thedeadbolt corresponds to an endpoint of a travel range of the sensor.

In some implementations, the travel range of the deadbolt is along alinear path between the lock and a deadbolt slot, and the travel rangeof the sensor is along a non-linear path.

In some implementations, the method includes determining, by theprocessor, a current draw of a motor from a battery source; andadjusting operation of the deadbolt based on the current draw of themotor and the position of the deadbolt of the lock based on the gravityvector indicative of the position of the sensor.

Some of the subject matter described herein also includes a deadboltconfigured to extend along a linear path into a deadbolt slot to lock adoor, and configured to retract along the linear path out of thedeadbolt slot to unlock the door; an accelerometer configured to rotatealong a non-linear path as the deadbolt moves along the linear path, andconfigured to generate a gravity vector indicative of its position alongthe non-linear path; and a controller circuit configured to determine aposition of the deadbolt along the linear path based on the gravityvector that is indicative of the position of the accelerometer along thenon-linear path.

In some implementations, the apparatus includes a motor configured toextend or retract the deadbolt along the linear path, wherein thecontroller instructs the motor to extend or retract the deadbolt basedon the position of the deadbolt along the linear path that is determinedbased on the gravity vector that is indicative of the position of theaccelerometer along the non-linear path.

In some implementations, the apparatus includes a battery; and a currentsensor configured to determine an amount of current drawn from thebattery by the motor, wherein the controller circuit further instructsthe motor to extend or retract based on the current drawn from thebattery by the motor.

In some implementations, the accelerometer is positioned upon acomponent of an electromechanical lock that is configured to rotatealong the non-linear path as the deadbolt moves along the linear path.

In some implementations, the linear path has a first endpoint and asecond endpoint, and the non-linear path has a first endpoint and asecond endpoint, the first endpoints of the linear path and thenon-linear path corresponding to the door being in the unlock state, andthe second endpoints of the linear path and the non-linear pathcorresponding to the door being in the lock state.

In some implementations, the linear path is a travel range of thedeadbolt, and the non-linear path is a travel range of the accelerometeras it rotates.

In some implementations, the controller is further configured to receivedata indicating that the lock should switch among an unlock state and alock state, and the controller is configured to adjust the position ofthe deadbolt to correspond to data.

In some implementations, each position along the non-linear pathcorresponds to a different gravity vector.

Some of the subject matter described herein includes a sensor configuredto rotate along a first path as a door switches between an unlock stateand a lock state, and configured to generate positional data indicativeof its position along the first path; a deadbolt configured to extendalong a second path to set the door in the unlock state, and configuredto retract along the second path to set the door in the lock state, thefirst path and the second path being different; a motor configured tocause the deadbolt to extend or retract along the second path; and acontroller configured to obtain the positional data from the sensor anddetermine a position of the deadbolt along the second path, andconfigured to operate the motor to extend or retract the deadbolt basedon the positional data.

In some implementations, the first path is a non-linear path, and thesecond path is a linear path.

In some implementations, the positional data corresponds to a gravityvector that is indicative of the position of the sensor along thenon-linear path.

In some implementations, the linear path is between a housing of anelectromechanical lock including the deadbolt and a deadbolt slot of adoor jamb.

In some implementations, the sensor is an accelerometer.

In some implementations, the positional data corresponds to a gravityvector that is indicative of a position of the accelerometer along thefirst path.

In some implementations, the positional data corresponds to a gravityvector that is indicative of an inclination of the accelerometer.

In some implementations, the apparatus includes a current sensorconfigured to determine characteristics regarding usage of a battery bythe motor, wherein the controller is further configured to operate themotor to extend or retract the deadbolt based on the characteristicsregarding usage of a battery by the motor.

In some implementations, the characteristics regarding usage of thebattery by the motor include a current draw of the motor.

In some implementations, the controller is configured to determinecharacteristics of the door based on the positional data of the sensorand the characteristics regarding the usage of the battery by the motor.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of determining a position of a deadbolt bydetermining a gravity vector of an accelerometer.

FIG. 2 illustrates an example of a block diagram for determininginformation regarding characteristics of a door based on the position ofthe deadbolt.

FIG. 3 illustrates an example of determining characteristics of a doorbased on a gravity vector and a current draw of a motor of anelectromechanical lock.

FIG. 4 illustrates an example of a block diagram for adjusting operationof a deadbolt based on characteristics of a door.

FIG. 5 illustrates another example of adjusting operation of a deadbolt.

FIG. 6 illustrates an environment for using an electromechanical lock.

FIG. 7 illustrates an example of an electromechanical lock.

FIG. 8 illustrates an example of an accelerometer positioned within anelectromechanical lock.

DETAILED DESCRIPTION

This disclosure describes devices and techniques for anelectromechanical lock. In one example, an electromechanical lock can bea “smart” lock that can lock or unlock a door by receiving instructionsfrom a wireless electronic device such as a smartphone, tablet,smartwatch, etc. The electromechanical lock can include an accelerometerpositioned upon a component (e.g., a throw arm) that rotates along anarc, or curved or non-linear path, as the deadbolt of theelectromechanical lock retracts away from or extends along a linear pathinto a deadbolt slot of the door jamb having a deadbolt strike plate tounlock or lock the door, respectively. For example, as the key or thepaddle of the electromechanical lock is rotated, this can result in thecomponent that the accelerometer is positioned upon to also rotate.Additionally, the electromechanical lock can receive data from asmartphone requesting that it lock or unlock the door. In this case, itcan use a motor to retract or extract the deadbolt, which also causesthe component that the accelerometer is positioned upon to rotate. As aresult, the accelerometer can also rotate as the electromechanical locktransitions between locked and unlocked states.

Each position along the arc can have a corresponding unique gravityvector in comparison to other positions that can be determined by theaccelerometer. For example, the gravity vector corresponding to thedeadbolt in the unlocked state (e.g., fully retracted, or at one end ofits travel range) can be different than the gravity vector correspondingto the deadbolt in the locked state (e.g., fully extended, or it hasreached the other end of its travel range) because the accelerometerwould be upon different places along the arc and, therefore, atdifferent inclinations. The other positions in between the unlockedstate and locked state, for example corresponding to a ten percentextended deadbolt, a fifty percent extended deadbolt, an eighty percentextended deadbolt, etc. can each also have unique gravity vectors. Thus,the accelerometer can provide the gravity vector to a controller circuitwhich can use the gravity vector to determine the position of thedeadbolt.

Determining the linear position of the deadbolt (e.g., along a pathbetween the electromechanical lock and the deadbolt slot) using agravity vector as determined by an accelerometer that rotates along anarc (e.g., along a curved or non-linear path) with a component of theelectromechanical lock can allow for a precise determination of theposition of the deadbolt. Additionally, an accelerometer can usesignificantly lower power than other types of sensors. Therefore, theelectromechanical lock can operate more often while not draining itsbattery as quickly as electromechanical locks using different types ofsensors.

In more detail, FIG. 1 illustrates an example of determining a positionof a deadbolt by determining a gravity vector of an accelerometer. InFIG. 1, door 105 can include electromechanical lock 110 having a paddle112 on the inside of an environment (e.g., a home that the door providesaccess) and a key slot on the outside. Turning paddle 112 in onedirection can result in deadbolt 114 to retract into a housing orenclosure of electromechanical lock 110 to unlock door 105. Turningpaddle 112 in the other direction can result in deadbolt 114 to extendinto deadbolt slot 115 of a door jamb to lock door 105. Inserting thekey and rotating in different directions can also unlock or lock door105.

Electromechanical lock 110 can be a “smart” lock having a variety offunctionality including computing devices having wireless communicationscapabilities that allow it to communicate with other computing devices.For example, the homeowner of the home that door 105 provides access tomight have a smartphone that can wirelessly communicate withelectromechanical lock 110 via one of the Institute of Electrical andElectronics Engineers (IEEE) 802.11 standards, Bluetooth®, Zigbee,Z-Wave, or other wireless communication techniques. In someimplementations, electromechanical lock 110 can access a network such asthe Internet via the smartphone. In other implementations,electromechanical lock 110 can access another network on its own withoutthe smartphone as an intermediary. Thus, electromechanical lock 110 andthe homeowner's smartphone can exchange data amongst themselves. Forexample, electromechanical lock 110 can provide data regarding the stateof electromechanical lock 110 to the smartphone so that the homeownerknows whether door 105 is fully locked in a secure state, is unlocked,or other characteristics regarding door 105, or characteristics of oroperation of electromechanical lock 110. Electromechanical lock 110 canalso receive data from the smartphone via wireless communicationsproviding an instruction to unlock or lock door 105. For example,electromechanical lock 110 can include a motor that can be activated(e.g., turned on) to retract or extract deadbolt 114 without having thehomeowner manually use a key or paddle 112.

In FIG. 1, electromechanical lock 110 can determine the position ofdeadbolt 114 to determine characteristics of electromechanical lock 110and/or door 105. For example, the position of deadbolt 114 can providean indication as to whether door 105 is in a locked state or an unlockedstate, or even in some partially locked or partially unlocked state.This information can then be provided to a smartphone such that thehomeowner can know the state of door 105. Additionally,electromechanical lock 110 can determine whether to cease operation ofthe motor (i.e., stop retracting or extending deadbolt 114) based on theposition of deadbolt 114. For example, when deadbolt 114 is fullyretracted to unlock the door or fully extended to lock the door, themotor can be instructed to cease operation, for example, by providing acontrol signal that is used to turn on or off the motor.

The position of deadbolt 114 can be determined by using accelerometer140 of electromechanical lock 110 as a sensor. Accelerometer 140 can bea device (e.g., a microelectromechanical systems (MEMS)-based sensor andrelated circuitry) that can measure the acceleration or tilt (orinclination) of an object that it is positioned upon. In FIG. 1,accelerometer 140 can be positioned upon a component ofelectromechanical lock 110 that rotates as deadbolt 114 retracts orextends. For example, electromechanical lock 110 can include a lockcylinder that rotates as the key slot or paddle 112 rotates, or can berotated via a motor that is turned on upon receiving instructions froman electronic device such as a smartphone. The rotation of that cylindercan cause other components of electromechanical lock 110 to rotate, forexample, a throw arm. If accelerometer 140 is positioned upon thatrotatable component (e.g., the throw arm), then accelerometer 140 isitself rotated as electromechanical lock 110 retracts or extendsdeadbolt 114.

For example, FIG. 8 illustrates an accelerometer positioned within anelectromechanical lock. In FIG. 8, accelerometer 140 can be placed onflexible circuit board 820 and printed circuit board 815 can includecontroller 150. These circuit boards can be housed within enclosures 805a and 805 b of electromechanical lock 110 having a deadbolt shaft 810for housing deadbolt 114. When paddle 112 is rotated, a key is insertedand rotated, or the motor is activated, this can cause deadbolt 114 toextend and for flexible circuit board 820 to rotate as deadbolt 114extends. Thus, accelerometer 140 positioned upon flexible circuit board820 also rotates.

Therefore, accelerometer 140 can move along a path that can berepresented by an arc. As the accelerometer moves along that arc, theposition of deadbolt 114 can change. That is, as accelerometer 140 movesalong a curved path such as an arc, deadbolt 114 can move along a linearpath as it extends from electromechanical lock 110 and into deadboltslot 115 in the door jamb. The movement from the beginning to end of thearc can therefore represent the full travel range of deadbolt 114 frombeing fully retracted (e.g., causing door 105 to unlock) to being fullyextended (e.g., causing door 105 to be locked) and positions in between.Accelerometer 140 can determine the gravity vector at the differentpositions. The gravity vector can be used to determine the position ofdeadbolt 114.

For example, in FIG. 1, at position 120, paddle 112 of electromechanicallock 110 can be at a position that allows for door 105 to be unlocked,for example, deadbolt 114 can be retracted into electromechanical lock114 as close as its travel range allows. Thus, in FIG. 1 at position120, no part of deadbolt 114 is within deadbolt slot 115 of the doorjamb, allowing for door 105 to be unlocked and, therefore the homeownercan open door 105. Arc 135 at position 120 indicates that accelerometer140 is at the beginning of its travel range corresponding to theposition of paddle 112. If accelerometer 140 determines its gravityvector, it might be represented by the arrow indicating a downwardvector in this simplified example. The gravity vector can represent athree-dimensional vector indicating the direction and/or magnitude ofgravity based on the x, y, and z axes. Thus, the gravity vector can beused to determine accelerometer 140's orientation within space (e.g. itsinclination), which can be different for different positions along arc140 due to it being rotated as electromechanical lock 110 transitionsamong locked and unlocked states.

At position 125, paddle 112 is rotated from the initial position ofposition 120 to begin locking door 105. Thus, in FIG. 1, deadbolt 114begins to extend into its travel range such that its tip extends fartheraway from the housing of electromechanical lock 110. As indicated, theposition of accelerometer 140 along arc 135 changes, resulting in thegravity vector also changing. That is, at position 125, the angle of thegravity vector with respect to earth is different than at position 120because accelerometer 140 is at a different position along arc 135 dueto the rotation of the component. Thus, the gravity vector can representa tilt or inclination of accelerometer 140 as it rotates along arc 135.

Next, at position 130 paddle 112 might be in a final position such thatit cannot be moved further along its current path. This results indeadbolt 114 being fully extended from electromechanical lock 110 andoccupying a significant amount of space within deadbolt slot 115 (e.g.,more space than at positions 125, 120, or other positions along arc135). This results in door 105 being in a “fully” locked state. Priorpositions along arc 135 might have resulted in door 105 being locked(e.g., deadbolt 114 might not occupy as much space within deadbolt slot115 but door 105 is still locked), but not as secure as in position 130.As indicated in FIG. 1, accelerometer 140 is at the other endpoint ofarc 135 from the beginning position 120. Thus, as accelerometer 140travels along the full curved travel range of arc 135, this also causesdeadbolt 114 to travel along its full linear travel range to securelylock door 105. The gravity vector at position 130 is also different thanthe gravity vectors at positions 120 and 125.

The different positions along arc 135 can cause accelerometer 140 todetermine or sense different gravity vectors. As accelerometer 140 movesalong arc 135, gravity vector information 145 can be provided tocontroller 150 of electromechanical lock 150. Controller 150 can use thegravity vector information to determine the position of deadbolt 114.For example, because each different gravity vector is the result ofaccelerometer being at a different positions along arc 135, thedifferent gravity vectors correspond go to different positions ofdeadbolt 114. Thus, if the gravity vector matches or is similar to agravity vector stored in memory and accessible by controller 150 for aposition associated with position 120, then controller 150 can determinethat deadbolt 114 is in a fully retracted position and door 105 is fullyunlocked and can be easily opened. If the gravity vector matches or issimilar to a gravity vector associated with position 130, thencontroller 150 can determine that deadbolt 114 is in a fully extendedposition and door 105 is fully and securely locked and, therefore cannotbe easily opened.

As discussed later herein, upon determining the position of deadbolt114, controller 150 can perform a variety of functionalities. Forexample, controller 150 can provide information to the homeowner'ssmartphone to provide an indication as to whether door 105 is locked,unlocked, or even in a partially locked or unlocked state (e.g., not atpositions 120 or 130). Controller 150 can also perform otherfunctionalities, for example, it can retract and then extend deadbolt114 again upon determining that the position is not appropriate.Additionally, controller 150 can instruct the motor of electromechanicallock 110 to cease operation upon a determination that the position ofthe deadbolt along its liner path corresponds to one of the endpoints ofthe non-linear path (e.g., the beginning or end) of the accelerometerbecause those endpoints would have different gravity vectors.

Using accelerometer 140 to determine the gravity vector and havingcontroller 150 correlate that with the position of deadbolt 114 canprovide a lower power solution. For example, accelerometers can uselower power than other types of sensors (e.g., hall effect sensors,rotary encoders, etc.). Additionally, accelerometers can occupy lessspace and, therefore, can easily fit within the limited space ofelectromechanical lock 110.

When the homeowner installs electromechanical lock 110 within door 105,a calibration process can be performed. For example, the homeowner canbe requested (e.g., via the smartphone) to switch electromechanical lockfrom the unlocked state or locked state several times (e.g., by usingpaddle 112 or a key) such that the gravity vectors at positions 120 and130 can be determined. That is, electromechanical lock 110 can beinstalled and then calibrated to determine the gravity vectors forposition 120 and position 130 in FIG. 1. Electromechanical lock 110 canthen be used to determine the position of deadbolt 114.

FIG. 2 illustrates an example of a block diagram for determininginformation regarding characteristics of a door based on the position ofthe deadbolt. In FIG. 2, the accelerometer can be positioned (205). Forexample, in FIG. 1, accelerometer 140 can be moved from position 120 toposition 130. Accelerometer 140 can then determine the gravity vectorbased on its current position along arc 135. If the gravity vectorchanges, this means that the position of deadbolt 114 has changed. Thus,accelerometer 140 can “wake up” controller 150, for example, turn itspower on, wake it up from a lower-power sleep state in which many of itsfunctionalities are turned off, etc. so that it can begin to determinethe position of deadbolt 114. By turning on controller 150 upon a changein the gravity vector, this can reduce power consumption becausecontroller 150 doesn't have to be on or operational as much asaccelerometer 140. Thus, the accelerometer can then provide the newlyacquired gravity vector to the controller (215). For example, in FIG. 1,gravity vector information 145 can be provided to controller 150.

The controller can then receive the gravity vector information (220).Based on the gravity vector, the position of the deadbolt can then bedetermined (225). For example, in FIG. 1, if the gravity vector matchesor is similar to the gravity vector of position 130, then this canindicate that the position of deadbolt 114 results in door 105 beingsecurely locked. Information regarding the characteristics of theposition of the deadbolt, electromechanical lock 110, or door 105 canthen be provided, for example, to a smartphone of the homeowner or aserver accessible via a network such as the Internet (230). For example,in FIG. 1, controller 150 can provide information to a smartphone of thehomeowner indicating that electromechanical lock 110 is fully engaged tolock door 105.

The operation of the electromechanical lock can also be adjusted basedon the position of the deadbolt (235). For example, in FIG. 1, deadbolt114 can cease to be extended into deadbolt slot 115 when accelerometer140 is at position 130 along arc 135. Thus, if the gravity vectormatches or is similar to a gravity vector of one of the endpoints of arc135 (e.g., positions 120 and 130 in FIG. 1), then this means thatelectromechanical lock 110 is in a lock state or unlock state and,therefore, deadbolt 114 should cease to be extended or retracted,respectively. This can be done by causing a motor of electromechanicallock to stop, extending or retracting deadbolt 114.

Additional sensors of electromechanical lock 110 can also be used. FIG.3 illustrates an example of determining characteristics of a door basedon a gravity vector and a current draw of a motor of anelectromechanical lock. In FIG. 3, controller 305 can instruct motor 305to retract or extend deadbolt 114 housed within deadbolt assembly 320(e.g., in response to receiving a command from a smartphone or otherelectronic device). Battery 310 can provide a power source for motor 305to use to drive deadbolt assembly 320. In some implementations, battery310 can be within deadbolt assembly 320 (e.g., it can be within deadbolt114). In FIG. 3, current sensor 315 can determine the current beingused, or drawn, by motor 305 as it attempts to position deadbolt 114within deadbolt assembly 320. This information can then be provided tocontroller 150.

Using the information regarding the current being used by motor 305 andthe gravity vector information 145 obtained from accelerometer 140,controller 150 can perform a variety of functionalities. For example,controller 150 can determine the position of deadbolt 114 and how muchcurrent is being used by motor 305 to position deadbolt 114. If thecurrent being used by motor 305 is above a threshold current for theposition that deadbolt 114 is currently at, this might indicate thatthere is some obstruction between deadbolt 114 and deadbolt slot 115,deadbolt 114 might not be properly aligned with deadbolt slot 115, etc.For example, an increase in friction can result in motor 305 needing touse more power (e.g., draw more current) to keep extending deadbolt 114into deadbolt slot 115. If there is too much friction, then this mightbe the result of some obstruction, alignment issue, or other problem.Thus, controller 150 might then instruct motor 305 to retract deadbolt114 and then extend it again. In another implementation, controller 150might then instruct motor 305 to retract deadbolt 114 (e.g., to position120 in FIG. 1) and then provide a message to the homeowner's smartphonethat there is a problem with door 105.

Other characteristic regarding the usage of the battery by the motor canalso be used when determining how to operate motor 305. For example, thevoltage provided by the battery can also be considered. Additionally,other characteristics regarding electromechanical lock 110 can beconsidered. For example, the ambient temperature, the temperature withinelectromechanical lock 110, humidity or other characteristics of theenvironment, etc. can also be considered. In one example, if it isdetermined by controller 150 that the temperature and/or humidity arewithin a threshold range (e.g., too hot or too humid) then this might beindicative of some potential expansion of the door, door jamb, etc. andtherefore there might be an increase in friction or resistance asdeadbolt 114 retracts or extracts. Thus, controller 150 can operatemotor 305 to use more current such that it has more power to positiondeadbolt 114. This can allow for electromechanical lock 105 tocompensate for the change in environment.

FIG. 4 illustrates an example of a block diagram for adjusting operationof a deadbolt based on characteristics of a door. In FIG. 4, acontroller can receive gravity vector information (405). For example, inFIG. 3, controller 150 can obtain gravity vector information 145 fromaccelerometer 140. Using the gravity vector, the position of thedeadbolt of the electromechanical lock can be determined (410). Forexample, in FIG. 3, the position of deadbolt 114 can be determined usinggravity vector information 145. The controller can also receiveinformation regarding the current used by a motor to cause the deadboltto change positions (415). For example, in FIG. 3, motor 305 can bepowered by battery 310 and, therefore, draw current as it pushes orpulls on deadbolt 114 to extend or retract it, respectively. Thiscurrent can be monitored and determined by current sensor 315 andinformation regarding that current can be provided to controller 150.

The controller can then determine characteristics of the door,electromechanical lock, or deadbolt based on the position of thedeadbolt and/or current used by the motor. For example, in FIG. 3,controller 150 can determine whether there is some obstruction blockingthe entry of deadbolt 114 into deadbolt slot 115 if the current used bymotor 305 is at or above some threshold current and the position ofdeadbolt 114 is determined to correspond to one of the positions alongarc 135 in which it should be within deadbolt slot 115. The controllercan then adjust the operation of the deadbolt based on thecharacteristics (425). For example, if it is determined that there is anobstruction, then controller 150 in FIG. 3 can retract deadbolt 114 andinform the homeowner that there is an obstruction preventingelectromechanical lock 110 from locking door 105.

Many of the examples described herein include using the gravity vectoras determined by an accelerometer. However, the same or differentaccelerometer can also provide other types of data. For example, anaccelerometer can also provide information regarding acceleration of thecomponent that it is placed upon. As a result, the accelerometer candetermine the acceleration (or even merely the presence of acceleration)of the door as it swings towards an open state (after being unlocked) orclosed state (to be locked). This information can be provided to acontroller and the controller can then retract the deadbolt so that itdoes not hit the door jamb. This can prevent damage to the door jamb,door, and/or electromechanical lock and also provide a more comfortablehomeowner experience if the homeowner uses the smartphone to lock thedoor while it is swinging.

FIG. 5 illustrates another example of adjusting operation of a deadbolt.In FIG. 5, the controller can determine that the door is swinging (505).For example, accelerometer 140 in FIG. 1 or 3 can be used to determinethat it is experiencing acceleration. Because accelerometer 140 can behoused within electromechanical lock 140, this means that door 105 isswinging open or closed. Controller 150 can then adjust operation of thedeadbolt based on the determination that the door is swinging (510). Forexample, controller 150 can instruct motor 305 in FIG. 3 to retractdeadbolt 114 to a position such that it would not strike the door jamb,for example, fully retracted to position 120 in FIG. 1 or to position125 (e.g., a position just before when it would enter deadbolt slot115).

FIG. 6 illustrates an environment for using an electromechanical lock.As previously discussed, electromechanical lock 110 can be installedwithin door 105 and provide information to smartphone 605, for example,information 615 indicating that door 105 might not be fully locked. Forexample, if using the techniques disclosed herein that the controller ofelectromechanical lock 110 determines that the position of deadbolt 114has only reached eighty percent of its travel range and motor 305 is nolonger extending deadbolt 114 (e.g., because current sensor 315indicates that it is drawing current above a threshold amount frombattery 310 and, in some implementations, drawing too much current canresult in the power to the motor to be turned off because drawing toomuch current can indicate the presence of an obstruction within the pathof the deadbolt), then controller 150 can generate data and transmit it(e.g., wirelessly using an antenna of electromechanical lock 110) tosmartphone 605 indicating that the door might be locked, but not to thefull potential or capabilities of electromechanical lock 110 (e.g., notat position 130 in FIG. 1). Any of the characteristics or informationregarding or generated by door 105, electromechanical lock 110,accelerometer 140, and deadbolt 114 can be provided to smartphone 605.For example, this can include the position of deadbolt 114, whether door105 is in a locked state or unlocked state, the current used motor 305to operate deadbolt 114, gravity vector information 145, etc.Additionally, this information can be provided to server 610, forexample, a cloud server that smartphone 605 can connect with over theInternet. As depicted in FIG. 6, door characteristics 620 can beprovided to server 610, but any of the information or characteristicsdescribed herein can also be provided to server 610. For example,characteristics regarding electromechanical lock 110, deadbolt 114,motor 305, etc. can be provided.

FIG. 7 illustrates an example of an electromechanical lock. In FIG. 7,electromechanical lock 110 includes a processor 705, memory 710, antenna715, and lock components 720 (e.g., the components used to implementretracting and extending deadbolt 114 such as those described in FIGS.1-6). In some implementations, electromechanical lock 110 can alsoinclude touchscreen displays, speakers, microphones, as well as othertypes of hardware such as non-volatile memory, an interface device,camera, radios, etc. to lock components 110 providing the techniques andsystems disclosed herein. For example, lock components 720 can implementa variety of modules, units, components, logic, etc. implemented viacircuitry and other hardware and software to provide the functionalitiesdescribed herein along with processor 705 (e.g., implementing controller150). Various common components (e.g., cache memory) are omitted forillustrative simplicity. The electromechanical lock in FIG. 7 isintended to illustrate a hardware device on which any of the componentsdescribed in the example of FIGS. 1-6 (and any other componentsdescribed in this specification) can be implemented. The components ofthe electromechanical lock can be coupled together via a bus or throughsome other known or convenient device.

The processor 705 may be, for example, a microprocessor circuit such asan Intel Pentium microprocessor or Motorola power PC microprocessor. Oneof skill in the relevant art will recognize that the terms“machine-readable (storage) medium” or “computer-readable (storage)medium” include any type of device that is accessible by the processor.Processor 705 can also be circuitry such as an application specificintegrated circuits (ASICs), complex programmable logic devices (CPLDs),field programmable gate arrays (FPGAs), structured ASICs, etc.

The memory is coupled to the processor by, for example, a bus. Thememory can include, by way of example but not limitation, random accessmemory (RAM), such as dynamic RAM (DRAM) and static RAM (SRAM). Thememory can be local, remote, or distributed.

The bus also couples the processor to the non-volatile memory and driveunit. The non-volatile memory is often a magnetic floppy or hard disk; amagnetic-optical disk; an optical disk; a read-only memory (ROM) such asa CD-ROM, EPROM, or EEPROM; a magnetic or optical card; or another formof storage for large amounts of data. Some of this data is oftenwritten, by a direct memory access process, into memory during theexecution of software in the computer. The non-volatile storage can belocal, remote or distributed. The non-volatile memory is optionalbecause systems can be created with all applicable data available inmemory. A typical computer system will usually include at least aprocessor, memory, and a device (e.g., a bus) coupling the memory to theprocessor.

The software can be stored in the non-volatile memory and/or the driveunit. Indeed, storing an entire large program in memory may not even bepossible. Nevertheless, it should be understood that for software torun, it may be necessary to move the software to a computer-readablelocation appropriate for processing, and, for illustrative purposes,that location is referred to as memory in this application. Even whensoftware is moved to memory for execution, the processor will typicallymake use of hardware registers to store values associated with thesoftware and make use of a local cache that, ideally, serves toaccelerate execution. As used herein, a software program is can bestored at any known or convenient location (from non-volatile storage tohardware registers).

The bus also couples the processor to the network interface device. Theinterface can include one or more of a modem or network interface. Thoseskilled in the art will appreciate that a modem or network interface canbe considered to be part of the computer system. The interface caninclude an analog modem, an ISDN modem, a cable modem, a token ringinterface, a satellite transmission interface (e.g., “direct PC”), orother interface for coupling a computer system to other computersystems. The interface can include one or more input and/or outputdevices. The input and/or output devices can include, by way of examplebut not limitation, a keyboard, a mouse or other pointing device, diskdrives, printers, a scanner, and other input and/or output devices,including a display device. The display device can include, by way ofexample but not limitation, a cathode ray tube (CRT), a liquid crystaldisplay (LCD), or some other applicable known or convenient displaydevice.

In operation, the assistant device can be controlled by operating systemsoftware that includes a file management system, such as a diskoperating system. The file management system is typically stored in thenon-volatile memory and/or drive unit and causes the processor toexecute the various acts required by the operating system to input andoutput data, and to store data in the memory, including storing files onthe non-volatile memory and/or drive unit.

Some items of the detailed description may be presented in terms ofalgorithms and symbolic representations of operations on data bitswithin a computer memory. These algorithmic descriptions andrepresentations are the means used by those skilled in the dataprocessing arts to most effectively convey the substance of their workto others skilled in the art. An algorithm is here, and generally,conceived to be a self-consistent sequence of operations leading to adesired result. The operations are those requiring physicalmanipulations of physical quantities. Usually, though not necessarily,these quantities take the form of electronic or magnetic signals capableof being stored, transferred, combined, compared, and/or otherwisemanipulated. It has proven convenient at times, principally for reasonsof common usage, to refer to these signals as bits, values, elements,symbols, characters, terms, numbers, or the like.

It should be borne in mind, however, that all of these and similar termsare to be associated with the appropriate physical quantities and aremerely convenient labels applied to these quantities. Unlessspecifically stated otherwise, as apparent from the followingdiscussion, those skilled in the art will appreciate that throughout thedescription, discussions utilizing terms such as “processing” or“computing” or “calculating” or “determining” or “displaying” or“generating” or the like refer to the action and processes of a computersystem or similar electronic computing device that manipulates andtransforms data represented as physical (electronic) quantities withinthe computer system's registers and memories into other data similarlyrepresented as physical quantities within the computer system's memoriesor registers or other such information storage, transmission, or displaydevices.

The algorithms and displays presented herein are not inherently relatedto any particular computer or other apparatus. Various general-purposesystems may be used with programs in accordance with the teachingsherein, or it may prove convenient to construct more specializedapparatuses to perform the methods of some embodiments. The requiredstructure for a variety of these systems will be apparent from thedescription below. In addition, the techniques are not described withreference to any particular programming language, and variousembodiments may thus be implemented using a variety of programminglanguages.

In further embodiments, the assistant device operates as a standalonedevice or may be connected (e.g., networked) to other machines. In anetworked deployment, the assistant device may operate in the capacityof a server or of a client machine in a client-server networkenvironment or may operate as a peer machine in a peer-to-peer (ordistributed) network environment.

In some embodiments, the assistant devices include a machine-readablemedium. While the machine-readable medium or machine-readable storagemedium is shown in an exemplary embodiment to be a single medium, theterm “machine-readable medium” and “machine-readable storage medium”should be taken to include a single medium or multiple media (e.g., acentralized or distributed database and/or associated caches andservers) that store the one or more sets of instructions. The term“machine-readable medium” and “machine-readable storage medium” shouldalso be taken to include any medium that is capable of storing,encoding, or carrying a set of instructions for execution by themachine, and which causes the machine to perform any one or more of themethodologies or modules of the presently disclosed technique andinnovation.

In general, the routines executed to implement the embodiments of thedisclosure may be implemented as part of an operating system or aspecific application, component, program, object, module, or sequence ofinstructions referred to as “computer programs.” The computer programstypically comprise one or more instructions set at various times invarious memory and storage devices in a computer that, when read andexecuted by one or more processing units or processors in a computer,cause the computer to perform operations to execute elements involvingvarious aspects of the disclosure.

Moreover, while embodiments have been described in the context of fullyfunctioning computers and computer systems, those skilled in the artwill appreciate that the various embodiments are capable of beingdistributed as a program product in a variety of forms, and that thedisclosure applies equally, regardless of the particular type ofmachine- or computer-readable media used to actually effect thedistribution.

Further examples of machine-readable storage media, machine-readablemedia, or computer-readable (storage) media include, but are not limitedto, recordable type media such as volatile and non-volatile memorydevices, floppy and other removable disks, hard disk drives, opticaldisks (e.g., Compact Disc Read-Only Memory (CD-ROMS), Digital VersatileDiscs, (DVDs), etc.), among others, and transmission type media such asdigital and analog communication links.

In some circumstances, operation of a memory device, such as a change instate from a binary one to a binary zero or vice-versa, for example, maycomprise a transformation, such as a physical transformation. Withparticular types of memory devices, such a physical transformation maycomprise a physical transformation of an article to a different state orthing. For example, but without limitation, for some types of memorydevices, a change in state may involve an accumulation and storage ofcharge or a release of stored charge. Likewise, in other memory devices,a change of state may comprise a physical change or transformation inmagnetic orientation or a physical change or transformation in molecularstructure, such as from crystalline to amorphous or vice-versa. Theforegoing is not intended to be an exhaustive list in which a change instate for a binary one to a binary zero or vice-versa in a memory devicemay comprise a transformation, such as a physical transformation.Rather, the foregoing is intended as illustrative examples.

A storage medium may typically be non-transitory or comprise anon-transitory device. In this context, a non-transitory storage mediummay include a device that is tangible, meaning that the device has aconcrete physical form, although the device may change its physicalstate. Thus, for example, non-transitory refers to a device remainingtangible despite this change in state.

The foregoing description of various embodiments of the claimed subjectmatter has been provided for the purposes of illustration anddescription. It is not intended to be exhaustive or to limit the claimedsubject matter to the precise forms disclosed. Many modifications andvariations will be apparent to one skilled in the art. Embodiments werechosen and described in order to best describe certain principles andpractical applications, thereby enabling others skilled in the relevantart to understand the subject matter, the various embodiments and thevarious modifications that are suited to the particular usescontemplated.

While embodiments have been described in the context of fullyfunctioning computers and computer systems, those skilled in the artwill appreciate that the various embodiments are capable of beingdistributed as a program product in a variety of forms and that thedisclosure applies equally regardless of the particular type of machine-or computer-readable media used to actually effect the distribution.

Although the above Detailed Description describes certain embodimentsand the best mode contemplated, no matter how detailed the above appearsin text, the embodiments can be practiced in many ways. Details of thesystems and methods may vary considerably in their implementationdetails while still being encompassed by the specification. As notedabove, particular terminology used when describing certain features oraspects of various embodiments should not be taken to imply that theterminology is being redefined herein to be restricted to any specificcharacteristics, features, or aspects of the disclosed technique withwhich that terminology is associated. In general, the terms used in thefollowing claims should not be construed to limit the disclosure to thespecific embodiments disclosed in the specification, unless those termsare explicitly defined herein. Accordingly, the actual scope of thetechnique encompasses not only the disclosed embodiments but also allequivalent ways of practicing or implementing the embodiments under theclaims.

The language used in the specification has been principally selected forreadability and instructional purposes, and it may not have beenselected to delineate or circumscribe the inventive subject matter. Itis therefore intended that the scope of the technique be limited not bythis Detailed Description, but rather by any claims that issue on anapplication based hereon. Accordingly, the disclosure of variousembodiments is intended to be illustrative, but not limiting, of thescope of the embodiments, which is set forth in the following claims.

From the foregoing, it will be appreciated that specific embodiments ofthe invention have been described herein for purposes of illustration,but that various modifications may be made without deviating from thescope of the invention. Accordingly, the invention is not limited exceptas by the appended claims.

We claim:
 1. An electromechanical smart lock comprising: a deadboltconfigured to move along a path between an unlock state and a lockstate; a sensor configured to rotate as the deadbolt moves between theunlock state and the lock state; and a controller configured to:determine a position of the sensor; determine whether the deadbolt is inthe unlock state or the lock state based on the determined position ofthe sensor; detect a change in the position of the sensor; and change anoperational state of the controller based on the change in the positionof the sensor to transition from a low-power mode to a mode associatedwith determining whether the deadbolt is in the unlock state or the lockstate.
 2. The electromechanical smart lock of claim 1, wherein theposition of the sensor is indicative of a gravity vector representing anangle of rotation of the sensor.
 3. The electromechanical smart lock ofclaim 2, wherein the sensor includes an accelerometer that is configuredto: determine a change in the gravity vector.
 4. The electromechanicalsmart lock of claim 2, wherein the controller is further configured to:determine a current draw of a motor from a battery source; and adjustoperation of the deadbolt based on the current draw of the motor and aposition of the deadbolt of the lock based on the gravity vectorindicative of the position of the sensor.
 5. The electromechanical smartlock of claim 1, wherein the path is a linear path, and the sensor isconfigured to rotate along a non-linear path.
 6. The electromechanicalsmart lock of claim 1, further comprising: a motor configured to movethe deadbolt along the path to transition the deadbolt between theunlock state and the lock state.
 7. The electromechanical smart lock ofclaim 6 further comprising: a wireless communication interface, whereinthe controller is further configured to: receive an instruction via thewireless communication interface from a smartphone, the instructionincluding a request to transition the deadbolt from the determined stateto a desired state; and cause the motor to move the deadbolt along thepath from the determined state to the desired state; and cause the motorto either stop or move the deadbolt based on a determination of aposition of the deadbolt along the path relative to an endpoint of thepath.
 8. The electromechanical smart lock of claim 7, wherein thedetermined state is the unlocked state and the desired state is thelocked state, and wherein the instruction is a request to transition thedeadbolt from the unlocked state to the locked state along a linearpath.
 9. The electromechanical smart lock of claim 1, wherein thecontroller is further configured to: upon detecting the change in theposition of the sensor, determine a change in the operational state ofthe controller.
 10. The electromechanical smart lock of claim 1, whereinthe sensor includes an accelerometer.
 11. A method comprising:determining, by a processor, a position of a sensor along a non-linearpath; determining, by the processor, a first position of a deadboltbased on the position of the sensor; instructing, by the processor, amotor connected to the deadbolt to adjust the position of the deadboltalong a linear path from the first position to a second position;receiving, by the processor, a change in the position of the sensor asthe sensor rotates during the adjusting of the position of the deadboltalong the linear path; determining, by the processor, that the deadboltis in the second position based on the change in the position of thesensor; and changing, based on the change in the position of the sensor,an operational state of the processor to transition from a low-powermode to a mode associated with determining the position of the deadboltalong the linear path.
 12. The method of claim 11, wherein the sensor isan accelerometer.
 13. The method of claim 11, wherein the sensor isdisposed on a component of a lock that rotates as the lock transitionsamong an unlock state and a lock state.
 14. The method of claim 11further comprising: receiving, by the processor, data from an electronicdevice, the data indicating that the deadbolt should switch between thefirst position and the second position; and adjusting the position ofthe deadbolt based on the data received from the electronic deviceindicating that the deadbolt should switch between the first positionand the second position, the first position corresponding to a lockstate and the second position corresponding to an unlock state.
 15. Themethod of claim 11, wherein an endpoint of the linear path correspondsto an endpoint of a rotational range of the sensor.
 16. The method ofclaim 11, further comprising: determining, by the processor, a currentdraw of the motor from a battery source; and adjusting operation of alock based on the current draw of the motor and the position of thedeadbolt based on a gravity vector indicative of the position of thesensor.
 17. An apparatus comprising: a deadbolt configured to extendalong a first path into a deadbolt slot to lock a door, and configuredto retract along the first path out of the deadbolt slot to unlock thedoor; an accelerometer configured to rotate along a second path as thedeadbolt moves along the first path, and a controller circuit configuredto: determine a gravity vector of the accelerometer indicative of aposition of the accelerometer along the second path; determine aposition of the deadbolt along the first path based on the determinedgravity vector of the accelerometer; and change an operational state ofthe controller circuit based on a change in the gravity vector totransition from a low-power mode to a mode associated with determiningthe position of the deadbolt along the first path.
 18. The apparatus ofclaim 17, wherein the controller circuit is further configured to:determine the change in the gravity vector as the accelerometer movesalong the second path; determine a change in the position of thedeadbolt along the first path based on the change in the gravity vector.19. The apparatus of claim 17 further comprising: a motor configured toextend or retract the deadbolt along the first path, wherein thecontroller circuit instructs the motor to extend or retract the deadboltbased on the position of the deadbolt along the first path that isdetermined based on the determined gravity vector of the accelerometer.20. The apparatus of claim 17 further comprising: a battery; and acurrent sensor configured to determine an amount of current drawn fromthe battery by a motor, wherein the controller circuit further instructsthe motor to extend or retract based on the current drawn from thebattery by the motor.
 21. The apparatus of claim 17, wherein theaccelerometer is positioned upon a component of an electromechanicallock that is configured to rotate along the second path as the deadboltmoves along the first path.
 22. The apparatus of claim 17, wherein thefirst path and second path include a first endpoint corresponding to thedoor being in an unlock state, and the first path and second pathinclude a second endpoint corresponding to the door being in a lockstate.
 23. The apparatus of claim 22, wherein the first path is a travelrange of the deadbolt, and the second path is a travel range of theaccelerometer as the accelerometer rotates.
 24. The apparatus of claim17, wherein the controller is further configured to receive dataindicating that the lock should switch among an unlock state and a lockstate, and the controller is configured to adjust the position of thedeadbolt based on the received data.
 25. A method comprising: receiving,by a processor, a first position of an accelerometer on a non-linearpath; determining, by the processor, a first position of a deadboltbased on the position of the accelerometer, the first position of thedeadbolt corresponding to the deadbolt being in a locked position;sending, by the processor, a first alert to a device indicating that thedeadbolt is in the locked position; receiving, by the processor, aninstruction from the device to move the deadbolt to a second position,the second position corresponding to the deadbolt being in an unlockedposition; instructing, by the processor, a motor to move the deadboltfrom the first position to the second position; determining, by theprocessor, a second position of the accelerometer indicative that thedeadbolt is in the second position; instructing, by the processor, themotor to stop moving the deadbolt; sending, by the processor, a secondalert to the device that the deadbolt is in the unlocked position; andchanging, by the processor, an operational state of the processor to alow-power mode based on a change in the position of the accelerometer.